非热剪切对植物性各向异性结构谷蛋白构象的影响

IF 6.3 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY
Mariana Angonese , João B. Laurindo , Bruno A.M. Carciofi
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引用次数: 0

摘要

操纵小麦面筋以获得纤维状结构是一种很有前景的方法,可用于大规模或小规模制作肉类类似物。与挤压法相比,温和的方法可以节省能源,避免感官属性/蛋白质降解。本研究旨在评估用低温剪切法制造麸质纤维的效果,评估材料结构与加工强度的关系。研究了非热剪切长度(最长 10 分钟)和附加机械能(最高 565.5 焦耳/克)对高度水合的小麦面筋基质的影响,包括密度、渗出、次生蛋白质结构(傅立叶变换红外光谱)、蛋白质网络属性(共聚焦激光扫描显微镜)、伸长属性、形态(扫描电镜)和熟化基质的各向异性。剪切过程的进展与β片层二级结构的发展(占 26% 至 50%)、较高的伸长属性、生基质密度和熟基质的各向异性有关。较高的蛋白质血管长度和宽度与β片的形成和堆积有关。渗出、熟基质密度和终点速率与较高的α-螺旋含量(从占优势的39%降至11%)和较低的剪切附加能有关。对整个数据集进行的主成分分析证实了这些观察结果,而形态学则揭示了剪切过程中基质组织的演变。这些结果表明,对高度水合的富含麸质的基质进行低温剪切有可能改变蛋白质的构象,从而为控制纤维结构的发展提供了可能性,这对肉类类似物等新食品是有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-thermal shearing effect on gluten conformation for plant-based anisotropic structures
Wheat gluten manipulation to obtain fibrillar structures is a promising approach for elaborating meat analogs on large or small scales. Alternatively to extrusion, mild methods can save energy and avoid sensory attributes/protein degradation. This study aimed to evaluate low-temperature shearing to create gluten-based fibers, assessing the material structure as a function of processing intensity. The effect of the non-thermal shearing length (up to 10 min) and added mechanical energy (up to 565.5 J/g) applied on a highly hydrated wheat gluten-based matrix was investigated in terms of density, exudation, secondary protein structure (FTIR), protein network attributes (confocal laser scanning microscopy), elongation attributes, morphology (SEM), and anisotropicity of cooked matrices. The progression of the shearing process was associated with the development of β-sheet secondary structures (26 % to 50 % predominancy), higher elongation attributes, raw matrix density, and anisotropicity of cooked matrices. Higher protein vessel length and width were associated with the formation and stacking of β-sheets. Exudation, cooked matrix density, and endpoint rate were associated with higher α-helices content (lowered from 39 % to 11 % of predominancy) and lower shearing-added energies. A principal component analysis of the entire dataset confirmed these observations, and the morphology revealed the evolution of the matrix organization during the shearing process. These results underscore the potential of mild-temperature shearing of a highly hydrated gluten-enriched matrix to alter the protein conformation, opening possibilities for controlling fiber structure development, valid for new foods such as meat analogs.
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来源期刊
CiteScore
12.00
自引率
6.10%
发文量
259
审稿时长
25 days
期刊介绍: Innovative Food Science and Emerging Technologies (IFSET) aims to provide the highest quality original contributions and few, mainly upon invitation, reviews on and highly innovative developments in food science and emerging food process technologies. The significance of the results either for the science community or for industrial R&D groups must be specified. Papers submitted must be of highest scientific quality and only those advancing current scientific knowledge and understanding or with technical relevance will be considered.
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